US 12,284,704 B2
Handling of split radio bearers during MCG/SCG failure recovery
Oumer Teyeb, Montréal (CA); and Antonino Orsino, Kirkkonummi (FI)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 17/907,782
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Feb. 16, 2021, PCT No. PCT/SE2021/050130
§ 371(c)(1), (2) Date Aug. 29, 2022,
PCT Pub. No. WO2021/194404, PCT Pub. Date Sep. 30, 2021.
Claims priority of provisional application 62/994,059, filed on Mar. 24, 2020.
Prior Publication US 2023/0127850 A1, Apr. 27, 2023
Int. Cl. H04W 76/15 (2018.01); H04W 36/00 (2009.01); H04W 36/30 (2009.01); H04W 76/19 (2018.01)
CPC H04W 76/15 (2018.02) [H04W 36/0016 (2013.01); H04W 36/0069 (2018.08); H04W 36/00698 (2023.05); H04W 36/305 (2018.08); H04W 76/19 (2018.02); H04W 36/00695 (2023.05)] 21 Claims
OG exemplary drawing
 
1. A method performed by a user equipment (UE) configured for dual connectivity with a master node (MN) providing a master cell group that includes a primary serving cell (PCell) and with a secondary node (SN) providing a secondary cell group that includes a primary secondary cell (PSCell), the method comprising:
detecting a radio link problem associated with a first serving cell, wherein first serving cell is the PCell or the PSCell; and
in response to detecting the radio link problem, for each of the UE's split radio bearers that has a primary path set to a first cell group that includes the first serving cell, performing a recovery procedure such that all uplink (UL) data transmission for the split radio bearer occurs only via a secondary path that does not include the first serving cell.